Its good to start with red buff then krugs and raptors, after full clear you will be lvl 3 for sure then you can take your red buff side scuttle if enemy jugnler is something strong early better don't try to contest it if your botlane or midlane is not able to come for help try to go for your blue side scuttle then full clear blue jungle and recall, try to dodge early game fights except dragon contest, you can focus set your gank pressure at botlane so you can focus at drakes and also help a bit midlane, if you took your topside scuttle after it try to instant help your toplaner is there is good position for gank,you can start join more in fights when you max and evolve Q so you will be able to execute someone.

At Mid Game you need to focus at farm so you can finish your 3rd or 4th item depends on your stat. When the teamfight phase start try to flang enemy team and focus their backline usually the backline is adcarry and support but sometimes there can be squshi midlaner like veigar, if can do an good engage do it, but its better to wait someone start an fight so enemy frontline leave their backline and try to focus your first execute from the backline need to be the adcarry.

Late Game you will be an monster, if you are full build you will have really good life steal and damage. try to do worth trades at jungle like camping enemy adcarry at blue buff bush if you are sure they don't have vision, gonna be useful to take oracle for this if you execute even one of them, will be easier in team fight.